Others have told the court they plan to back the effort to reverse the net neutrality repeal, including New York City, eBay Inc and some members of Congress.

FCC Chairman Ajit Pai has repeatedly said he believes the rules will be upheld and will encourage additional investment by providers. The internet groups brief rejected the argument that the net neutrality rules had led to diminished investment.

The FCC did not immediately comment on the internet groups’ legal brief.

The net neutrality repeal was a win for internet service providers, like Comcast Corp, AT&T Inc and Verizon Communications Inc, whose practices faced significant government oversight and FCC investigations under the 2015 order.

The U.S. Senate voted in May to keep the Obama-era internet rules, but the measure is unlikely to be approved by the House of Representatives or the White House.